Answer:
once a year
Step-by-step explanation:
Once a year is the minimum, but you may want to check it more frequently than that depending on your circumstances.
If you want to get an idea of where you stand credit-wise, checking your credit report is a good place to start. Your credit report – or more accurately, reports, since each credit bureau produces its own report on you – is a documentation of all your past history with credit. Each includes a list of every account you've owned, including credit cards, loans and other forms of credit, along with their payment history, account status and other important details.